/ Thesaurus / T Synonyms of tercentennial Find synonyms for: Noun1. tercentennial, tercentenary, triennial, anniversary, day of remembranceusage: the 300th anniversary (or the celebration of it)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ravenous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language